A tactical shield is a small, mobile defensive plate you carry on one limb and can maneuver to intercept attacks against you.
A hand wielding a tactical shield can still hold another object and be used to reload weapons, but it cannot wield weapons or other shields. You can use a tactical shield to make unarmed attacks that do not count as archaic.
When you wield a basic tactical shield, as a move action you can align the shield to grant you greater protection against one opponent you are observing, which grants you a +1 shield bonus to AC against attacks from that opponent until the beginning of your next turn. The field and advanced tactical shields grant you a +1 shield bonus to AC when wielded, though this does not increase when aligned against a target. The elite tactical shield increases the shield bonus when aligned against a target to +2, and the paragon tactical shield increases this to +3.
Starfinder Character Operations Manual © 2019, Paizo Inc.; Authors: Alexander Augunas, Kate Baker, Simone Dietzler, Jennifer Dworschack-Kinter, Leo Glass, Sasha Lindley Hall, Amanda Hamon, Vanessa Hoskins, Jenny Jarzabski, Jason Keeley, Lyz Liddell, Luis Loza, Ron Lundeen, Crystal Malarsky, Robert G. McCreary, Conor J. Owens, Joe Pasini, Owen K.C. Stephens, Jason Tondro, and Landon Winkler.